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【单选题】
右图所示装置可用于测定空气中氧气的含量，实验前在集气瓶内加入少量水，并做上记号。下列说法中正确的是A.
该实验说明空气具有可燃性
B.
红磷燃烧的反应类型为化合反应
C.
此反应中的红磷可用硫代替
D.
红磷燃烧产生大量的
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